Understanding Kidney Disease: Causes and Prevention

Sleep trouble is a good example of just how easy kidney disease is to miss. Insomnia has dozens of causes, kidney disease isn't high on anyone's mental list, and it's not the kind of symptom that sends most people to the doctor.

But people with kidney disease, particularly those approaching kidney failure, can have real difficulty sleeping. If it's happening alongside other symptoms on this list, it's worth mentioning to your doctor rather than chalking it up to stress.

Feeling worn out even after a decent night's sleep is one of the more common experiences for people with kidney disease. Part of the reason is anemia, which can develop when the kidneys aren't functioning well.

Since red blood cells carry oxygen throughout the body, a drop in healthy red blood cell count means your body is working harder on less. Treating the anemia often helps with the fatigue, though poor sleep can compound things, too.

If you've been exhausted for weeks with no obvious explanation, that's worth a conversation with your doctor.

Blood in the urine is understandably alarming, and it should be. It's one of the symptoms people tend to act on quickly, which is the right instinct. That said, it isn't exclusive to kidney disease; kidney stones can cause it too, and sometimes the blood is only detectable under a microscope rather than visible to the eye.

Kidney disease can also cause other changes in urine color. Either way, don't try to self-diagnose. A doctor can find the cause and, if it turns out to be nothing serious, give you peace of mind.

The connection between kidney disease and persistent itching isn't obvious, but it makes sense once you understand what the kidneys do. When they're working properly, they filter toxins out of the bloodstream.

When they're not, those toxins can build up and cause itching that no amount of moisturizer will fix. This tends to show up in the later stages of kidney failure, and there are prescription options that can help manage it.

Healthy kidneys keep sodium from accumulating in the body. When that system breaks down, sodium builds up, and the body retains fluid. Gravity does the rest, pulling that fluid downward and causing swelling around the ankles.

It's one of those symptoms that can point to several different conditions, but if your ankles are consistently puffy and you're noticing other things on this list, the kidneys are worth investigating.

A loss of appetite can stem from a variety of physical or emotional causes, so it's another symptom that's easy to explain away. But when the kidneys stop filtering effectively, toxins accumulate in the body, which can genuinely suppress hunger.

If you've had a persistent or recurring lack of appetite that you can't account for, it's worth getting checked out rather than waiting to see if it passes.

When the kidneys slow down or stop filtering toxins, the body responds much as it does to spoiled food: it tries to reject the problem.

The result is often persistent nausea without an obvious dietary cause. On its own, nausea is easy to dismiss. Paired with fatigue, swelling, or changes in urination, it starts to tell a clearer story.

Kidney disease and anemia are closely linked. The kidneys produce a hormone that signals the body to make red blood cells, so when they're failing, that signal weakens.

Fewer red blood cells mean less oxygen circulating through the body, which shows up as tiredness, shortness of breath, and a general feeling of running on empty. A simple blood test can confirm anemia, and from there, your doctor can work out whether kidney disease is driving it.

Forgetfulness is easy to dismiss, especially as we get older. But failing kidneys can affect how well blood and oxygen reach the brain, and that can show up as cognitive fog or memory lapses that feel out of character. It's one of the more overlooked symptoms of kidney disease precisely because there are so many other things people assume are to blame. If the forgetfulness feels new or is getting worse alongside other symptoms here, it's worth raising with your doctor.